Unidentified photographer / artist
1873
The Graphoscope

Catalogue illustration
Google Books
"The Graphoscope is an instrument for developing and giving a most beautiful and stereoscopic effect to engravings, prints, photographs, &c. By a very simple arrangement it can also be converted into a stereoscope, suitable both for transparent or opaque views. The instrument is simple and easy to use, and is made portable so as to pack into a small compass."
 
Published in the "Illustrated descriptive catalogue of achromatic microscopes, telescopes, opera, race, and field glasses, and other Optical, Philsophical, Mathematical, Surveying, and Standard Meteorological Instruments, manufactured by M. Pillischer" of 88 New Bond Street, London, W1, p.50
 
LL/34776